package thread;

import java.util.Scanner;

public class SleepDemo {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入一个数");
        for (int num = scan.nextInt();num>0;num--){
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(num-1);
        }
        System.out.println("倒计时结束");
    }
}
